Part # LM137 LM337 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: Three-terminal adjustable negative voltage regulators


Part Details:

LM137LM337 Three-terminal adjustable negative voltage regulators Features Output voltage adjustable down to VREF 1.5 A guaranteed output current 0.3 %/V typical load regulation 0.01 %/V typical line regulation Current limit constant with temperature Ripple rejection: 77 dB TO-220 TO-3 Standard 3-lead transistor packages Excellent thermal regulation: 0.002 %/V 50 ppm/°C temperature coefficient Description Included on the chip are current limit, thermal The LM137 series are adjustable 3-terminal overload protection and safe area protection. All negative voltage regulators capable of supplying overload protection circuitry remains fully in excess -1.5 A over a -1.2 to -37 V output functional even if the adjustment terminal is voltage range. They are exceptionally easy to use disconnected. and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, LM137 regulators are supplied in standard transistor packages which are easily mounted and handled. In addition to higher performance than fixed regulators, the LM137 series offer full overload protection available only in integrated circuits. Table 1. Device summary Part numbers Order codes Temperature range LM137 LM137K -55 °C to 150 °C LM337 LM337K 0 °C to 125 °C July 2008 Rev 3 1/18 www.st.com 18 Contents LM137 - LM337 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5


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LM137 LM337.pdf Datasheet